102820450875 has 64 divisors (see below), whose sum is σ = 175999824000. Its totient is φ = 53276160000.

The previous prime is 102820450853. The next prime is 102820450877. The reversal of 102820450875 is 578054028201.

It is not a de Polignac number, because 102820450875 - 2⁸ = 102820450619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102820450877) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3691501 + ... + 3719249.

It is an arithmetic number, because the mean of its divisors is an integer number (2749997250).

Almost surely, 2^102820450875 is an apocalyptic number.

102820450875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102820450875 is a deficient number, since it is larger than the sum of its proper divisors (73179373125).

102820450875 is a wasteful number, since it uses less digits than its factorization.

102820450875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28049 (or 28039 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 42.

The spelling of 102820450875 in words is "one hundred two billion, eight hundred twenty million, four hundred fifty thousand, eight hundred seventy-five".